/* CFDpilot — shared guide page styles */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:     #0b1929;
  --bg2:    #0d1e30;
  --navy:   #1B3A6B;
  --blue:   #2E86AB;
  --cyan:   #00bcd4;
  --white:  #f0f4f8;
  --dim:    #7a9ab8;
  --dim2:   #4a6a88;
  --border: rgba(46,134,171,0.18);
  --code-bg:#07111e;
}

body {
  background: var(--bg);
  color: var(--white);
  font-family: 'Poppins', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Nav ── */
nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 40px;
  background: rgba(11,25,41,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px; font-weight: 500;
  color: var(--white); text-decoration: none;
  letter-spacing: -0.3px;
}
.nav-logo span { color: var(--cyan); }
.nav-cta {
  padding: 8px 20px;
  background: var(--cyan);
  color: #081522;
  border-radius: 4px;
  font-size: 13px; font-weight: 600;
  text-decoration: none;
  transition: background 0.15s;
}
.nav-cta:hover { background: #0dcfe8; text-decoration: none; }

/* ── Layout ── */
.page-wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 52px 24px 100px;
}

/* ── Breadcrumb ── */
.breadcrumb {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--dim2);
  margin-bottom: 32px;
  letter-spacing: 0.3px;
}
.breadcrumb a { color: var(--dim2); }
.breadcrumb a:hover { color: var(--dim); text-decoration: none; }
.breadcrumb span { margin: 0 6px; }

/* ── Article ── */
.guide-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.guide-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--dim2);
  margin-top: 12px;
  margin-bottom: 40px;
  letter-spacing: 0.3px;
}
.guide-refs {
  margin: 48px 0;
  padding: 20px 24px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.guide-refs-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--cyan);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.guide-refs ul {
  list-style: none;
  padding: 0;
}
.guide-refs ul li {
  margin-bottom: 6px;
  font-size: 14px;
}
.guide-refs ul li a {
  color: var(--dim);
}
.guide-refs ul li a:hover {
  color: var(--white);
}
h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
  color: var(--white);
}
.guide-intro {
  font-size: 17px;
  color: var(--dim);
  line-height: 1.75;
  margin-bottom: 48px;
  padding-bottom: 36px;
  border-bottom: 1px solid var(--border);
}
h2 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.4px;
  margin: 44px 0 14px;
  color: var(--white);
}
h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--white);
  margin: 28px 0 10px;
}
p { color: var(--dim); margin-bottom: 16px; }
p strong { color: var(--white); font-weight: 600; }

ul, ol {
  padding-left: 20px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
li { color: var(--dim); }
li strong { color: var(--white); }

code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  background: var(--code-bg);
  color: var(--cyan);
  padding: 2px 7px;
  border-radius: 3px;
  border: 1px solid var(--border);
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  margin: 20px 0 28px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.7;
  color: #a8c8e0;
}
pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}
pre .comment { color: var(--dim2); }
pre .key { color: var(--cyan); }
pre .val { color: #f0c070; }

/* ── CTA box ── */
.guide-cta {
  margin: 52px 0;
  background: linear-gradient(135deg, rgba(27,58,107,0.4), rgba(14,32,53,0.9));
  border: 1px solid rgba(0,188,212,0.2);
  border-radius: 8px;
  padding: 36px 40px;
  text-align: center;
}
.guide-cta h3 {
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--white);
}
.guide-cta p {
  font-size: 14px;
  color: var(--dim);
  margin-bottom: 24px;
}
.btn-cta-guide {
  display: inline-block;
  padding: 12px 32px;
  background: var(--cyan);
  color: #081522;
  border-radius: 4px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: background 0.15s;
}
.btn-cta-guide:hover { background: #0dcfe8; text-decoration: none; }

/* ── Related ── */
.related {
  margin-top: 64px;
  padding-top: 36px;
  border-top: 1px solid var(--border);
}
.related-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--dim2);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}
.related-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 18px 20px;
  text-decoration: none;
  transition: border-color 0.15s;
  display: block;
}
.related-card:hover { border-color: var(--cyan); text-decoration: none; }
.related-card-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--white);
  margin-bottom: 4px;
}
.related-card-sub {
  font-size: 12px;
  color: var(--dim2);
}

/* ── Footer ── */
footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 28px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--white);
  font-weight: 500;
}
.footer-logo span { color: var(--cyan); }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 13px; color: var(--dim2); }
.footer-links a:hover { color: var(--white); text-decoration: none; }

@media (max-width: 640px) {
  nav { padding: 14px 20px; }
  .page-wrap { padding: 36px 20px 80px; }
  .related-grid { grid-template-columns: 1fr; }
  footer { flex-direction: column; align-items: flex-start; padding: 24px 20px; }
  .guide-cta { padding: 28px 24px; }
}